Base for ointments



Patented Mud, 1928. 1

ctm'r scnnonnmn ANnALrnun KEIL, or BERLIN, GERMANY.

BASE FOR OINTMENTS.

no Drawing. Application filed February 12, 1926,

This invention relates to the production of a material more particularly for use as a basis for or in conjunction with substances to be applied to the skin, such as face 5 creams, cosmetics, ointments, rouge or-the like. v r

According to this invention the material is'nianufactured by concentrating iuilk from WhlCll the fat has been rcn'ioved, to a syrupy consistency, then mixing in zinc oxide with or without the addition of a neutral substancesuch as glycerine.

The fat-free milk is preferably concentrated in a vacuum and the zinc oxide in very finely divided form is stirred into the concentrated fat-free milk while still warm; Achemica-l action evidently takes place between the zinc, oxide and the milk constituents, because the mass first becomes fluid and then hardens.

The product so obtained when mixed with some glycerinegives a viscous liquid, which. even on standing for a long time, remains homogeneous, and when applied to the skin dries quickly, is flexible with the skin, does not crack or crease and in addition does not lose colour. On the other hand the product is soluble in water and can easily be re moved by washing.

The product is an exceptionally good carrier for medicinal substances to he used externally, because it adheres to the part of the skin under treatment and obviates the necessity for plaster or bandages.

Rouges prepared with the material of this invention do not shine on the skin and do not run or run together even at relatively high temperatures, and such rou'ges may be produces a varnish-like covering whichthe further addition of an emollient like Serial No. 87,945, and in Germany March 3, 1925. a

removed very easily on Washing, thereby 4 rendering the use ofacream such as cold cream unnecessary for this purpose.

The following serves by way of example to illustrate how the material of this invention may be prepared:

parts of separated milk are evaporated under a vacuum to 25 parts, and 60, parts of finely divided zinc oxide are added under stirring while the evaporated milk is still warm. The mass, which atiirst is fairly f viscous, soon becomes thin, whereupon 25 parts of glycerine are added and the whole mixture introduced into the three roller mill and passed twice therethrough.

We claim:

1. The manufacture of a product, more particularly for use as a basis or carrier for substances to be applied to the skin, which consists in mixing under stirring finely divided zinc oxide into a syrup obtained 6 by concentrating separated or skim milk, whereby a compound is zobtained, which comprises milk constituents and zinc oxide;

2. The manufacture of a -product, more particularly for use as a-bas'is or carrier for substances to be applied to the skin,:which consists in mixing under stirring finely divided zinc oxide into a syrup obtained by concentrating separated or skim milk, with glycerine, whereby a compound is obtained which comprises milk constituents, zinc oxide and glycerine.

In testimony whereof we hereunto afiix our signatures.

CURT SCHROED'ER. ALFRED KEIL. 

